Bolster for construction container

ABSTRACT

A container includes a receptacle having sidewalls and a floor; and a plurality of bolsters attached to an underside portion of the floor. The bolsters include a lower panel spaced apart from the underside portion of the floor, at least two projections from the lower panel that form a first entry window, and a pair of walls extending from the lower panel to the floor that form a second entry window that is substantially perpendicular to the first entry window.

RELATED APPLICATIONS

This application claims priority to U.S. Provisional Application Ser. No. 60/857,879, filed Nov. 9, 2006, the disclosure of which is incorporated herein by reference in its entirety.

FIELD OF THE INVENTION

The present invention relates to containers, and in particular, the bolsters for construction containers.

BACKGROUND OF THE INVENTION

Large storage containers, including boxes and cabinets, used in the construction industry are often formed of steel sheet. The floor, walls and ceiling (or lid) of the container can be formed either from a single sheet of steel that is bent at intersecting edges of these surfaces or from multiple pieces of sheet steel that are welded together. Many containers have bolsters underlying the floor, and some will include casters beneath the bolsters. Typical sizes for such a cabinet or box can range from 5 ft³ to 150 ft³ or even larger. Exemplary storage containers include those sold under the name JOBOX™ by Delta Consolidated Industries, Jonesboro, Ark. and those sold under the name JOBMASTER™ by Knaack Manufacturing, Crystal Lake, Ill.

Large storage containers may be heavy and difficult to move, especially when fully loaded with construction materials. A forklift may be employed to move large storage containers; however, the bolsters and/or casters may make it difficult to orient the forklift prongs under the container to achieve proper balance and a secure lift. The forklift prongs and/or the location of the container may limit the container to be lifted from only one or two sides. Operators may be required to reorient the container so that the desired container side is facing the forklift. This may be difficult and/or time-consuming, especially if space for moving and reorienting the container is limited.

SUMMARY OF THE INVENTION

According to embodiments of the invention, a container includes a receptacle having sidewalls and a floor; and a plurality of bolsters attached to an underside portion of the floor. The bolsters include a lower panel spaced apart from the underside portion of the floor, at least two projections from the lower panel that form a first entry window, and a pair of walls extending from the lower panel to the floor that form a second entry window that is substantially perpendicular to the first entry window.

In particular embodiments, the second entry window forms an opening toward a side of the container and the first window forms an opening toward a front of the container. The lower panel may include a crease between the at least two projections. At least two bolsters of the plurality of bolsters may be formed from a single sheet of metal and/or at least one of the plurality of bolsters may be formed as a unitary member.

In some embodiments, the projections extend at least 0.25 inches from the lower panel. The projections may include apertures that are configured to receive casters. The bolster walls may be angled. The first and second entry windows may be configured to receive a prong from a forklift.

According to further embodiments of the present invention, a container includes a receptacle having sidewalls and a floor, the sidewalls defining a front and a side of the container. A plurality of bolsters are attached to an underside portion of the floor. The bolsters form at least a portion of a first entry window accessible from the front of the container and form at least a portion of a second entry window accessible from the side of the container.

According to still further embodiments of the present invention, a bolster configured to attach to an underside portion of a container includes a lower panel, at least two projections from the lower panel that form a first entry window, and a pair of walls extending from the lower panel and configured to attach to the floor. The pair of walls form a second entry window that is substantially perpendicular to the first entry window.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain principles of the invention.

FIG. 1 is a top perspective view of a container having bolsters according to embodiments of the present invention;

FIG. 2 is an enlarged partial top perspective view of the container and bolster of FIG. 1;

FIG. 3 is an enlarged bottom perspective view of the container and bolsters of FIG. 1 with the casters removed;

FIG. 4 is a perspective view of the bolster of FIGS. 1-3;

FIG. 5 is a bottom plan view of the bolster of FIGS. 1-4;

FIG. 6 is a front view of the bolsters of FIGS. 1-5;

FIG. 7 is a side view of the bolsters of FIGS. 1-6;

FIG. 8 is a perspective view of the container of FIGS. 1-3 being lifted by a forklift from the front of the container.

FIG. 9 is a perspective view of the container of FIGS. 1-3 being lifted by a forklift from the side of the container;

FIG. 10 is a partial top perspective view of the container and a bolster according to further embodiments of the present invention; and

FIG. 11 is a top perspective view of a container and bolsters according to still further embodiments of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

The present invention now will be described hereinafter with reference to the accompanying drawings and examples, in which embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

Like numbers refer to like elements throughout. In the figures, the thickness of certain lines, layers, components, elements or features may be exaggerated for clarity. Broken lines illustrate optional features or operations unless specified otherwise.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. As used herein, phrases such as “between X and Y” and “between about X and Y” should be interpreted to include X and Y. As used herein, phrases such as “between about X and Y” mean “between about X and about Y.” As used herein, phrases such as “from about X to Y” mean “from about X to about Y.”

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the specification and relevant art and should not be interpreted in an idealized or overly formal sense unless expressly so defined herein. Well-known functions or constructions may not be described in detail for brevity and/or clarity.

It will be understood that when an element is referred to as being “on”, “attached” to, “connected” to, “coupled” with, “contacting”, etc., another element, it can be directly on, attached to, connected to, coupled with or contacting the other element or intervening elements may also be present. In contrast, when an element is referred to as being, for example, “directly on”, “directly attached” to, “directly connected” to, “directly coupled” with or “directly contacting” another element, there are no intervening elements present. It will also be appreciated by those of skill in the art that references to a structure or feature that is disposed “adjacent” another feature may have portions that overlap or underlie the adjacent feature.

Spatially relative terms, such as “under”, “below”, “lower”, “over”, “upper” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, elements described as “under” or “beneath” other elements or features would then be oriented “over” the other elements or features. Thus, the exemplary term “under” can encompass both an orientation of “over” and “under”. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. Similarly, the terms “upwardly”, “downwardly”, “vertical”, “horizontal” and the like are used herein for the purpose of explanation only unless specifically indicated otherwise.

It will be understood that, although the terms “first”, “second”, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another region, layer or section. Thus, a “first” element, component, region, layer or section discussed below could also be termed a “second” element, component, region, layer or section without departing from the teachings of the present invention. The sequence of operations (or steps) is not limited to the order presented in the claims or figures unless specifically indicated otherwise.

Referring to FIGS. 1-3, a container 10 is shown therin. The container 10 includes a receptacle 20 having a front wall 21, opposing sidewalls 22 that are perpendicular to the front wall 21, a rear wall 23 that opposes the front wall 21, and a floor 24. A cover 25 is attached via a hinge to the rear wall 23. The container 10 also includes four bolsters 30 on the underside of the floor 24. The bolsters 30 each define at least two entry windows 50, 60. As shown in FIG. 3-5, two bolsters 30 may be formed as a single, unitary dual bolster assembly 31. As shown in FIGS. 1-7, each of the bolsters 30 includes a lower panel 32 with projections 34 that extend downwardly from the lower panel 32 to form the entry window 50. A pair of walls 36 extend upwardly from the lower panel 32 to the floor 24 and form the other entry window 60. In addition, the lower panel 32 includes creases 38 a, 38 b. The projections 34 include apertures 40. The apertures 40 are configured to receive casters 48 therein as shown in FIG. 2. As shown in FIGS. 3 and 4, an upper panel 42 connects one or more of the bolsters 30.

As shown in FIGS. 8-9, the bolsters 30 provide entry windows 50, 60 that are substantially perpendicular to one another such that the container 10 may be lifted by a forklift 70 from the sides or from the front or back of the container 10. The entry windows 50, 60 form openings that are accessible from a side of the container 10 (i.e., via window 50) and from a front of the container 60 (i.e., via window 60). As illustrated, prongs 72 of the forklift 70 may be inserted in respective entry windows 60 to lift the container 10 from the front (FIG. 8) or the prongs 72 of the forklift 70 may be inserted in respective entry windows 50 to lift the container from the side (FIG. 9).

Those skilled in this art will recognize that the container 10 may take other configurations. For example, various sizes, shapes and configurations can be used to form the bolsters 30 and entry windows 50, 60. In particular, as shown in FIG. 10, a container 100 includes a bolster 130 having entry windows 150, 160. As illustrated in FIG. 10, the bolster 130 includes walls 136 that extend downwardly from the container 100 and a lower panel 134. The walls 136 have an opening that forms the entry window 150. The walls 136 and the panel 134 together form the entry window 160. In this configuration, the entry windows 150, 160 are accessible from a side and a front of the container.

As illustrated in FIG. 11, a container 200 includes bolsters 230 extending along a side 222 of a receptacle 220. The receptacle 220 has a front wall 221, opposing sidewalls 222 that are perpendicular to the front wall 221, a rear wall 223 that opposes the front wall 221, a floor 24, and a cover 235 that is attached via a hinge to the rear wall 223. The bolsters 230 define an entry window 250 adjacent the front wall 221. The bolsters 230 also include a notch 232 adjacent the side walls 222, which defines another entry window 260. In this configuration, the prongs from a forklift may be inserted from the front of the container 200 via the entry window 250 or from the side of the container 200 via the entry window 260.

As shown in FIGS. 4-7, the bolster 30 is formed as a unitary member. In particular, the dual bolster assembly 31 may be formed from a unitary member such as a single sheet of metal and connected by the upper panel 42. The sheet of metal may have a thickness between 0.0299 and 0.5 inches. The bolsters 30 may be attached to the floor 24 by the panel 42 and the upper portion of the walls 36, for example, by welding. In some embodiments, the upper panel 42 is omitted, and the bolsters 30 are formed separately from one another.

The bolsters 30 include creases 38 a, 38 b, which may increase the strength and/or rigidity of the bolster 30. The lower crease 38 b may also guide the prong 72 of the forklift 70 into the entry windows 60 as shown in FIG. 8. In some embodiments, the creases 38 a, 38 b are omitted.

As shown in FIGS. 3 and 6, the bolster walls 36 extend at an angle with respect to the upper panel 42, the lower panel 32 and the container floor 24 such that the bolster walls 36 are not perpendicular to the container floor 24. As illustrated, the angle at which the walls 36 extend with respect to the container floor 24 and the panels 32, 42 may strengthen the structure of the bolsters 30 for bearing weight from the container 10; however, in some embodiments, the bolster walls 36 may be perpendicular to the container floor 24 and the panels 32, 42.

As illustrated in FIGS. 1-7, the projections 34 of the bolsters 30 include apertures 40, which may be used to hold casters 48 therein as shown in FIG. 2. Pairs of the projections 34 on the bolsters 30 define the entry window 50 such that, when the container 10 is positioned on a flat surface, such as the ground or floor, the entry window 50 provides sufficient space for the prongs 72 of the forklift 70 so that the forklift 70 can lift the container 10 from the front (FIG. 2 and FIG. 8). In some embodiments, the projections extend at least 0.25 inches from the lower panel 32. However, the apertures 40 and casters 48 may be omitted, and the bolsters 30 may rest directly on the ground or floor. If the casters 48 are omitted, the projections 34 may extend a greater distance from the lower panel 32 to provide sufficient space for the prongs 72 of the forklift 70, such as at least 0.25 inches from the lower panel 32.

As illustrated in FIG. 2, two casters 48 are affixed to each bolster 30 on respective projections 34 by screws 48 a. The illustrated two-caster configuration may provide stability and support to the container 10; however, one caster 48 per bolster 30 may be used, or more than two casters 48 may be used on a single bolster 30. The casters can have a height of between three and sixteen inches.

The foregoing is illustrative of the present invention and is not to be construed as limiting thereof. Although a few exemplary embodiments of this invention have been described, those skilled in the art will readily appreciate that many modifications are possible in the exemplary embodiments without materially departing from the novel teachings and advantages of this invention. Accordingly, all such modifications are intended to be included within the scope of this invention as defined in the claims. Therefore, it is to be understood that the foregoing is illustrative of the present invention and is not to be construed as limited to the specific embodiments disclosed, and that modifications to the disclosed embodiments, as well as other embodiments, are intended to be included within the scope of the appended claims. The invention is defined by the following claims, with equivalents of the claims to be included therein. 

1. A container comprising: a receptacle having walls and a floor; and a plurality of bolsters attached to an underside portion of the floor, the bolsters comprising: a lower panel spaced apart from the underside portion of the floor; at least two projections that extend downwardly from the lower panel that form a first entry window; and a pair of walls extending from the lower panel to the floor that form a second entry window that is substantially perpendicular to the first entry window.
 2. The container of claim 1, wherein the second entry window forms an opening that is accessible from a side of the container and the first window forms an opening that is accessible from the front of the container.
 3. The container of claim 1, where the lower panel includes a crease between the at least two projections.
 4. The container of claim 1, wherein at least two bolsters of the plurality of bolsters are formed from a single unitary member.
 5. The container of claim 1, wherein the single unitary member is a single sheet of metal.
 6. The container of claim 1, wherein at least one of the plurality of bolsters is formed as a unitary member.
 7. The container of claim 1, wherein the projections extend at least 0.25 inches from the lower panel.
 8. The container of claim 1, wherein the projections include apertures that are configured to receive casters.
 9. The container of claim 1, wherein the bolster walls extend from the floor at an oblique angle.
 10. The container of claim 1, wherein the first and second entry windows are sized and configured to receive a prong from a forklift.
 11. A container comprising: a receptacle having walls and a floor, the walls defining a front and a side of the container; and a plurality of bolsters attached to an underside portion of the floor, the bolsters forming at least a portion of a first entry window accessible from the front of the container and forming at least a portion of a second entry window accessible from the side of the container.
 12. The container of claim 11, wherein the bolsters comprise: a lower panel spaced apart from the underside portion of the floor; at least two projections that extend downwardly from the lower panel that form the first entry window; and a pair of walls extending from the lower panel to the floor that form the second entry window.
 13. The container of claim 12, where the lower panel includes a crease between the at least two projections.
 14. The container of claim 11, wherein at least two bolsters of the plurality of bolsters are formed from a single unitary member.
 15. The container of claim 14, wherein the unitary member is a single sheet of metal.
 16. The container of claim 11, wherein at least one of the plurality of bolsters is formed as a unitary member.
 17. The container of claim 11, wherein the projections extend at least 0.25 inches from the lower panel.
 18. The container of claim 11, wherein the bolsters include apertures that are configured to receive casters.
 19. The container of claim 11, wherein the bolster walls extend from the floor at an oblique angle.
 20. The container of claim 11, wherein the first and second entry windows are sized and configured to receive a prong from a forklift.
 21. The container of claim 11, wherein at least two of the plurality of bolsters are spaced apart to define one of the first or second entry windows therebetween.
 22. The container of claim 21, wherein at least one of the plurality of bolsters includes a notch that defines at least a portion of the other of the first or second entry windows.
 23. The container of claim 22, wherein the notch is adjacent one of the walls and/or the floor.
 24. A bolster configured to attach to an underside portion of a container, the bolster comprising: a lower panel; at least two projections that extend downwardly from the lower panel that form a first entry window; and a pair of walls extending from the lower panel and configured to attach to the floor, the pair of walls forming a second entry window that is substantially perpendicular to the first entry window.
 25. The bolster of claim 24, wherein the lower panel includes a crease between the at least two projections.
 26. The bolster of claim 24, wherein the bolster is formed as a unitary member.
 27. The bolster of claim 24, wherein the unitary member is a single sheet of metal.
 28. The bolster of claim 24, wherein the projections extend at least 0.25 inches from the lower panel.
 29. The bolster of claim 24, wherein the projections include apertures that are configured to receive casters.
 30. The bolster of claim 24, wherein the bolster walls extend from the floor at an oblique angle.
 31. A bolster assembly configured to attach to an underside portion of a container, the bolster assembly comprising: at least two bolsters comprising: a lower panel; at least two projections that extend downwardly from the lower panel that form a first entry window; and a pair of walls extending from the lower panel and configured to attach to the floor, the pair of walls forming a second entry window that is substantially perpendicular to the first entry window; and a panel connecting the at least two bolsters.
 32. A bolster configured to attach to an underside portion of a container, the bolster comprising: a pair of walls configured to extend from an underside portion of the container, the pair of walls forming an entry window that is sized and configured to receive a prong from a forklift therein. 